The author used Kothari’s (2009) book to choose the method to implement for this research study. According to his book, the author chose to collect existing literature about economic decision-making in the public and private sectors. The author achieved this with a traditional systematic review of current literature. The traditional systematic review of literature is a quantitative approach that helps to standardize methods and results in the studies that were collected. Because the researchers do not need to compare estimates manually, bias can be eliminated. Furthermore, with traditional systematic review of literature, the author can find papers that have been published internationally, all over the world, based off priori defined criteria. Unfortunately, the traditional systematic review of literature has some limitations. It usually returns a narrower range of results because of the confinements mentioned before. It may also not find the type of studies the researchers want to collect, because the traditional systematic review of literature is only going to look at articles that have been published with significant results. It will not find literature that is discrete in its findings. When a traditional systematic review of literature cannot unearth relevant studies, it is coined the “file-drawer” problem. Fortunately, this limitation can be avoided, since many new ways have been developed in methodological literature to test and eliminate it (Rosenthal, 1979; Card & Krueger, 1995; Begg & Mazumdar, 1994).